Fire extinguisher



plr 25, 1195@ C; A, MARTEL ZUEJH'QL FIRE EXTINGUISHER Filed Aug. l1, 1948 2 Sheets-s118611 l t www1@ mh 1 mill 25, E9@ c. A. MARTEL FIRE EXTINGUISHER 2 Sheets-Sheet 2 Filed Aug. ll, 1948 Fatented Apr. 25, 1950 NITED STATES TENT OFFICE FIRE EXTINGUISHER Claude Adelard Martel, Montreal, Quebec, Canada 11 Claims.

The present invention pertains toa novel nre extinguisher toibemountedinor on a ceiling.

The principal object of the invention is to provide a device of this character containing a supply of re-extinguishing liquid under pressure and adapted to discharge the same when `a predetermined unsafe temperature is attained. Another object is to provide in the extinguisher a switch that is `actuated to operate an alarm under the same conditions.

Still another object is to provide such a device that is `set in operation by the separation of a fusible link and by -the detonation of a cartridge on severing of the link.

In the accomplishment of these objects, the device includes a rod, preferably threaded, inserted in the ceiling and on which is mounted the container for the extinguishing fluid. The container has a double :bottom .landxis perforated beneath the upper bottom. 'The upper bottom has a discharge opening normally covered by a frictionally held cap.

A cartridge is carried by the container and is red by a detonating pin released .by the severing of a fusible link. The `gas under pressure released by the cartridge removes the aforementioned cap to permit thefluid toow to the apertures beneath the upper bottom.

Other objects and advantages will appear as the description proceeds.

The inventionn is fullydisclosed by way of example in the following description and in the accompanying drawings-in which:

Figure l -is `a vertical section of the device;

Figure 2 is a section on the line 12-2 of Figure l;

Figure 3 isa perspective View Vof-a detail;

Figure 4 is a detail section at `a right angle to Figure l;

Figure 5 is a complete ,section at a right angle to Figure l, showing adiierentpositonof parts;

Figure 6 is a perspective viewme the valve cap;

Figures 7, 8 and 9 are-elevations of modied guide screws;

Figure 10 is an elevation `of a4 modified con-n struction;

Figure 11 is a detail Avertical section ata `right angle to Figure. 1;

Figure 12 is.- a .similar section. showing the lowered position of the container;

Figure 13 is an. enlargeddetail of Figure l2: and

Figure 14 is a plan section at a lower lever than Figure 2. l

Reference to theseA vir-misl will now4 be made by use` of like .characters `which are employed.- to designate corresponding parts throughout.

In Figure 1 is .shown a Vceiling l in which` is concealed a housing `2 that `is open at the surface of the ceiling.V In the housing is slidably mounted a container v3 having a central sleeve` or core Il passing through the bottom 5. The con. tainer includes a dishA 6` fastened to the wall of the container and-engaging the lower end` of the core lIl, thereby forming a double` bottom; The dish has angular holes 'I normally closed against the housing 2,Y as shown in Figure 1.

Axialiy in thecore 4 `is positioned a rod 8 having a helical groove 9 and threaded at lll `at its upper end for-fasteningin the ceiling. Directli7 over the container 3 the zrod is formed with-a plate l! and above this with a `lug I2 carrying a switch box i3. The switch is `operated by a lever lli terminating in la ball I5. A leaf spring l5 is passed beneath and over` the switch boi;l and `carries `a socket member Il that receives the ball I5. The end of the lowerY lap of the spring carries a hammer I8` through which` is passed a pin I9 exposed at the lower end and carrying a hook 2.5 :at the upper end. The spaced end of .the upper lap carries a hook 2l., and the hooks are joinedby a two-part fusible link 22, shown in Figures 4 and 5.

In the upper .end of. the core @i is fastened a disk 2.3 carrying a` single ball 24 .adaptedV to ride inthe groove 9. Thus, the container Smayrotate and descend on the rod .8 under its weight when free. The lower end `ofthe rod carries .a similar disk 25 (Fig. 13) carrying lateral vball bearings` 2,6 engaging the corte .and surface bearings 2l tobe engaged by thedescended disk 23. In this .position the ball 24 lodges ina circular groove Zat the lower end of therod and rests on `a. shoulder 29 at the `lower extremity.

A small `off-center tube Silpasses throughthe top and bottom of the .container` 3. In the upper end of the tube is a shoulder .3A on which hangs an explosive cartridge 32. Over the cartridge is a screw nlug 33 through which is passed slid able pin 3i.'- adapted to strike the detonator` of the cartridge. The upper end of the pin hasvan exposed head 35 lying beneath the pin i9. A strip is fastened-to the `plate l! and hasan aperture 2r? whicl'i-` receives the head 35; rThe container is thus held from rotating and descending.

Adjacent tothel tube 3u, the bottom 5 of the container is formed with an opening 3ft' rimmed by a depending iiangesil; A cap 'it has a circular groove iti-andasmaller-recessii adapted to fit frictionally on the flange 39 and the exposed end e3 of the tube 35), respectively. j

The container 3 is nearly filled with a nreextinguishing liquid, such as carbon tetrachloride under gas pressure charged through a valve iii in the top of the container, as shown in Figure 12. The valve is preferably of the sliding pin type and is held closed by a spring 45. The pressure of the gas or air is determined by the size of the room in which is placed the invention.

Modied forms of guide screws consisting of twisted stock are shown in Figures 7, 8 and 9 and designated by the numerals 46, il and e8 respectively.

In the modication shown in Figure l0, the device is exposed beneath the ceiling. A cap is held against the ceiling by a screw 8 which carries a switch block I3', plate I I and associated parts as in Figure 4. A container .3 rides on the rod 8' as previously set forth.

In the operation of the rst embodimenuthe fusing temperature separates the link 22 as in Figure 2. Such links may be provided at 25 intervals of fusing temperature in a range from 125 to 500 F. On separation of the link Z2, the pin is strikes the head 35 of the pin 34 to detonate the cartridge 32. The head 35 is also driven out of the opening 3l, freeing the container 3 to rotate and descend under its weight. The strip 35 is formed with a hump 49 to keep the pin I9 from remaining in the hole 3'! and pre venting the container from rotating.

The gas released under pressure from the cartridge blows the cap 4U off the bottom 5. The

tured beneath the upper bottom, a tube passing through the top and the upper bottom of said container, a cartridge in the upper end of said tube, a bowed spring supported by said rod, a fusible link joining the ends of said spring, a pin carried by said spring and positioned to strike and detonate said cartridge on expansion of the spring, a housing normally covering the apertured portion of said container wall, said portion being movable beyond said housing as the container rides on said rod, means locking said con- ./ff"

tainer in said housing and disposed in the path of said pin to be released on movement of the pin said upper bottom having a discharge opening, and a cap frictionally and removably held against said opening and the lower end of said tube, whereby to be removed on explosion of said cartridge and form a iiuid path through said upper bottom to the apertured wall portion of said container as the latter rides on said rod and beyond said housing.

3. A fire extinguisher comprising a rod adapted to be suspended from a, ceiling, a fluid container adapted to ride on said rod and having a double bottom, the wall of said container being apertured beneath` the upper bottom, a tube passing through the top and the upper bottom of said container, a cartridge in the upper end of said tube, a bowed spring supported by said rod, a

fusible link joining the ends of said spring, a pin contents of the container iill the dish E and if'.

are sprayed in all directions from the apertures l as the latter clear the housing 2.

The expansion of the spring I6 actuates the switch lever I4 and operates an alarm (not shown) connected to the switch by wires 5l.

The modification shown in Figure 10 operates in like manner.

Although specific embodiments of the invention have been illustrated and described, it will be understood that various alterations in the details of construction may be made without departing from the scope of the invention as indicated by the appended claims.

VWhat I claim as my invention is:

, l. A fire extinguishercomprising a rod adapted to be suspended from a. ceiling, a uid container adapted to ride on said rod and having a double bottom. the wall of said container being apertur-ed beneath the upper bottom, a tube passing through the top and the upper bottom of said container, a cartridge in the upper end of said tube, a temperature-operated `pin positioned to strike and detonate said cartridge, said upper bottom having a discharge opening, a housing normally covering the apertured portion of container wall, said portion being movable beyond said housing as the container rides on said rod means locking said container in said housing and disposed in the pathof said pin tobe released on movement of the pin and a cap frictionallv and removably held against onen-- ing and the lower end of said tube, whereby to removed on explosion of said cartridge and form a fluid path through. said upper bottom to the apertured wall portion of said container the latter rides on said rod and beyond said housing 2. A ire extinguisher comprising a rod adapted to be suspended from a ceiling, a fluid container adapted to ride on said rod and having a double bottom, the wall of said container being apercarried by said spring and positioned to strike and detonate said cartridge on expansion of the spring, a housing normally covering the apertured portion of said container wall, said portion being movable beyond said housing as the container rides on said rod, means locking said container in said housing and disposed in the path of said pin to be released on movement of the pin, said upper bottom having a discharge opening, a switch mounted adjacent to said rod and adapted to be actuated by said spring on expansion thereof to operate an external circuit, and a cap frictionally and removably held against said opening and the lower end of said tube, whereby to be removed on explosion of said cartridge and form a fiuid path through said upper bottom to the apertured wall portion of said container as the latter rides on said rod and beyond said housing.

4. A nre extinguisher comprising a threaded rod adapted to be suspended from a ceiling, a iuid container enclosing said rod and having a double bottom, means on said container adapted to ride in the thread of said rod, the wall of said container being apertured beneath the upper bottom, a tube passing through the top and the upper bottom of said container, a, cartridge in the upper end of said tube, a temperatureoperated pin positioned to strike and detonate .u said cartridge, a housing normally covering the apertured portion of said container wall, said portion being movable beyond said housing as the container rides on said rod, means locking said container in said Yhousing and disposed in a the path of said pin to be released on movement of the pin, said upper bottom having a discharge opening, and a cap frictionally and removably held against said opening and the lower end of said tube, whereby to be removed on explosion i of said cartridge and form a fluid path through Said upper bottom to the apertured wall portion of said container as the latter rides on said rod and beyond said housing.

5. A iire extinguisher comprising a threaded rod adapted to be suspended from a ceiling, a

on expansion-ofthe spring, ahousingnormal-ly covering the apertured portionof-vsaid container wall, said portion being movable beyond said housing as "the `container wridesuon said rod, means locking said containerinsaid housing and disposed in the path ofsaidrpin to be released on movement of` the ipin, Lsaid upper, bottom having a discharge opening, and a cap-firictionallyand4 removably. ,heldagainst ,said opening' and the lower end of said tube, whereby to be removed onrexplosion, of said cartridge and form a fluid path through saidlupper-bottom tothe apertured wall portion of-'said'container `as "the latter `rides on said rod and beyond said housing.

6. A fire extinguisher comprising a threaded rod adapted to be suspended from a ceiling, a Huid container enclosing said rod and having a double bottom, means on said container adapted to ride in the thread of said rod, the wall of said container being apertured beneath the upper bottom, a tube passing through the top and the upper bottom of said container, a cartridge in the upper end of said tube, a bowed spring supported by said rod, a fusible link joining the ends of said spring, a pin carried by said spring and positioned to strike and detonate said cartridge on expansion of the spring, a housing normally covering the apertured portion of said container wall, said portion being movable beyond said housing as the container rides on said rod, means locking said container in said housing and disposed in the path of said pin to be released on movement of the pin, said upper bottom having a discharge opening, a switch mounted adjacent to said rod and adapted to be actuated by said spring on expansion thereof, to operate an external circuit, and a cap frictionally and removably held against said opening and the lower end of said tube. whereby to be removed on explosion of said cartridge and form a fluid path through said upper bottom to the anertured wall portion of said container as the latter rides on said rod and bevond said housing.

7. A re extinguisher comprising a threaded rod adapted to be suspended from a ceiling, a uuid container enclosing said rod and having double bottom. means on said container adapted to ride in the thread of said rod, the wall of said container being apertured beneath the upper bottom, tube passing through the top and the upper bottom of said container, a cartridge in the upper end of said tube, a temperature operated pin positioned to strike and detonate said cartridge. a housing normally covering the apertured portion of said container wall, said portion being movable beyond said housing as the container rides on said rod, means locking said container in said housing and disposed in the path of said pin to be released on movement of the pin, said upper bottom having a discharge opening, a striking pin in said tube and engageablev by said detonating pin, a strip fastened to said rod and having an aperture slidablv receiving said striking pin, and a cap frictionally and removably held against said opening and the lowerend of` saiditube, whereby ;to be removed .on explosion oifsaid cartridge and forma iiuidwpath through said y,upper bottom to the iaperturedfwall portion of'said container `as, the latter rides on said rod and :beyond said housing.

8. A re .extinguisher comprising a threaded rod adapted `to beisuspended from a ceiling, auid container enclosing said rod andhaving `a double bottom, means .on `said i container adapted to ride in the thread of said rod, the wall. of .said

container being apertured beneath `the `upper,

bottom, a ftubef passing through the top and the upper bottomof said container, `a cartridgein the upper end of said tube, a bowed springesup-` ported lby said irod, .afusiblellink joining fthe ends of said spring, a pincarried by `said spring and positioneduto strike and detonate said cartridge onexpansion of the spring, a `housing normally covering the apertured'portion ofsaid container wall, said portion being movable beyond said housingfas the container rides on saidrod,means locking said container in said housing and disposed `in `the path offsaid pin to be releasedion movement ofvthe pin, said upper bottom having a discharge opening, a striking pin in said tube and engageable by said detonating pin, a strip fastened to said rod and having an aperture slidably receiving said striking pin, and a cap frictionally and removably held against said opening and the lower end of said tube, whereby to be removed on explosion of said cartridge and form a fluid path through said upper bottom to the apertured wall portion of said container as the latter rides on said rod and beyond said housing.

9. A re extinguisher comprising a threaded rod adapted to be suspended from a ceiling, a fluid container enclosing said rod and having a double bottom, means on said container adapted to ride in the thread of said rod, the wall of said container being apertured beneath the upper bottom, a tube passing through the top and the upper bottom of said container, whereby said tube is adapted to communicate with the lower portion of said container, a cartridge in the upper end of said tube, a bowed spring supported by said rod, a fusible link joining the ends of said spring, a detonating pin carried by said spring, a housing normally covering the apertured portion of said container wall, said portion being movable beyond said housing as the container rides on said rod, means locking said container in said housing and disposed in the path of said pin to be released on movement of the pin, said upper bottom having e, discharge opening, a striking pin in said tube and engageable bv said detonating pin, a strip fastened to said rod and having an aperture slidably receiving said striking pin, a hump on said strip and engageable by said spring to hold said detonating pin out of said aperture, and a cap frictionally and removably held against said opening and the lower end of said tube, whereby to be removed on explosion of said cartridge and form a uid path through said upper bottom to the apertured wall portion of said container as the latter rides on said rod and beyond said housing.

l0. A nre extinguisher comprising a rod adapted to be suspended from a ceiling, a uid container adapted to ride on said rod and having e, double bottom, the wall of said container being apertured beneath the upper bottom, a tube passing through the top and the upper bottom of said container, a cartridge in the upper end of said tube, a temperature-operated pin positioned to strike and detonate said cartridge, a housing normally covering the apertured portion of said container wall, said portion being movable beyond said housing as the container rides on said rod, means locking said container in said housing and disposed in the path of said pin to be released on movement of the pin, said upper bottom having a, discharge opening, and a cap frictionally and removably held against said opening and the lower end of said tube, whereby to be removed on explosion of said cartridge and form a fluid path through said upper bottom to the apertured wall portion of said container as the latter rides on said rod and beyond said housing.

1l. A nre extinguisher comprising a rod to be suspended from a ceiling, a uid container adapted to ride on said rod, said container having a double bottom, the Wall of said container being apertured beneath the upper bottom, a tube passing through the top and the upper bottom of said container, a cartridge in the upper end of said tube, a temperature-operated pin positioned to strike and detonate said cartridge, a housing normally covering the apertured portion of said container wall, said portion being movable beyond said housing as the container rides on said rod, means locking said container in said housing and disposed in the path of said pin to be released on movement of the pin, said upper bottom having a discharge opening, and a cap frictionally and removably held against said opening and the lower end of said tube, whereby to be removed on explosion of said cartridge and form a uid path through said upper bottom to the apertured wall portion of said container as the latter rides on said rod and beyond saidY housing.

CLAUDE ADELARD MARTEL.

REFERENCES CITED The following references are of record in the 111e of this patent:

UNITED STATES PATENTS Number Name Date 1,966,661 Doughty July 17, i934 2,090,126 l Hugel Aug. 1'7, 1937 

